Cable casing cutter



May 23, 1939. T. SHERRILL CABLE CASING CUTTER Filed March 8, 1937 FIE 51E TORHEYS.

mm STAT ES PATEN OFFICE CABLE CASING CUTTER Ted I. Sherrill, Darby, Mont.

Application March 8, 1937, Serial No. 129,717 2 Claims. (01. 30-100) flj This invention relates to improvements in cutting devices and has particular reference to a device for cutting armored cable as well as the individual wires thereof, and further, stripping the insulation from the wires.

1 "I -The principal object of the invention is to pro- ,duce a device of this character which is simple in construction, easy to operate, and readily {transportable 4 p 1.10; f Afurther object is to produce a deviceof this [character wherein the cutting elements may be 3 readily removed for sharpening purposes. Axstill further object is to produce a device jiwherein the cutting elements will exert an even [15 Epressure about the entire surface of thecable and will out only through the armor thereof.

I Other objects and advantages will be apparent duringthe course of the following description.

, In the accompanying drawing forming a part of this specification and in which like numerals are employed to designate like parts throughout 1 cfthe same:

Fig; 1 is a side elevation of my tool;

Fig. 2 is an enlarged, fragmentary detailed 3.,view showing the wire cutting and stripping feature;

, 3 is a side elevation of severaljof the cutter elements joined together; f Fig. 4 is a side elevation of one of the cutter 30 elements Fig. 5 is an end elevation of one of the cutter elements;

-Fig, 6 is a cross section of one of the cutter elements; and

@35 1 Fig.7] is a similar cross section of another of the cutter elements. f

"mored cable cons1sts of a plurality of wires insulated one from another and surrounded by a 1 metalcovering. This covering may be of a spiral 40f formation, or may be of any other type of cover- 1 ting. It is often necessary to cut thisinsulation of armor in order to reach the wires within the cable. A hack saw is sometimes used, but there ,1, is always a possibility of cutting the wires within 45 thecable, which should be avoided.

Applicant has, therefore, devised a means for removing the cable armor by cutting around the circumference thereof and through the armor ,only :a sufficient distance to sever the armor.

5'0 Afterwards, the same may be removed from the cable and thewires exposed. If it is desiredto cut1the wires and remove the insulation there- .from,my tool will also accomplish this purpose. I the accompanying drawings wherein for the 5s purpose of illustration isshown a preferred embodiment of my invention, the numerals 5 and 6 designate two handles, each of which is provided with a semi-circular end I and 8 respectively. These handles are pivoted together as at 9. The handle 6 has an extension II, and the handle 5 has a plate |2 riveted thereto. The pivot 9 also goes through the plate [2. Cutting edges l3 are formed upon the extension II and plate l2 and provide means for cutting individual wires. A recess I4 is provided in the plate l2, and a scraper I6 is provided on the extension II, the scraper l6 entering the recess I. When a wire with its insulation is placed in the recess I4 and the scraper l6 moved thereagainst, the insulation on the wirewill be cut and will be stripped from the 'wire by pulling the wire in the proper direction.

Secured to the semi-circular portions 1 and 8 are a plurality of linked segments H and I8. These segments are secured to the semi-circular portions I; and 8 by screws or rivets I9. Each segment I! carries a knife blade 2|, and the segments l8 carry knife blades 22. The alternate knife blades 2| and 22are bevelled in opposite directions and are so-shaped that when the device is closed, as shown in Fig. 1, the cutting edges form a circular opening equal to the diameter of the inside of the armor of the cable.

When the device is used, spreading the handles 5 and 6 will cause the semi-circular portions 1 and 8 to spread, thus straightening out the chain links or segments l1 and I8 together with their blades 2| and 22.- The device is now placed about a cable so that the central blade in the chain will contact the outer surface of the cable. As the handles 5 and 6 are moved toward each other, the chain and its blades will wrap around the cable, the edge of the blade biting into and cutting through the armor with an even pressure from all sides, The tool is designed in such a manner that ,for a given size of cable the blades will only pass through the armor thereof. The blades are beveled in opposite directions, which prevents any tendency of the tool to move sidewise, and

5 carrying a semi-circular portion, a. plurality of linked segments secured to said semi-circular the invention or the scope of the subjoined claims. Having thus described my invention, I claim: 1. In a device of the character described, a pair of handles pivoted one to the other, each handle portions and lying within said semi-circular portions, and each link having a cutting knife secured thereto, the cutting edges of said knives m forming a complete arc of ative position, v

a circle when in oper- 2. In a device of the character described, a pair of handles pivoted one to the other, each handle carrying a semi-circular portion, a plurality of linked segments secured to the free ends of said semi-circular portions and lying within the are formed thereby, each link having a cutting knife secured thereto, the cutting edges of said knives forming the arc of a circle, and alternate knives thereof being beveled in opposite directions.

TED I. srmamm. 

